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A theoretical and synoptic study of western disturbances

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Summary

The theoretical part of the paper deals with the stability characteristics of the observed mean zonal current over India and neighbourhood in winter. The analysis shows that the mean zonal current is unstable with respect to a small perturbation superimposed on it.

The synoptic part deals with a case study of a western disturbance which developed into a depression. The development of the western disturbance is similar to the development of a baroclinically unstable disturbance. Power spectral analysis of the meridional component of wind shows a periodicity of 8∼10 days for western disturbances. The estimated wavelength of the western disturbance is in good agreement with the theoretically determined most unstable wavelength.

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Authors and Affiliations

  1. Poona-5, India

    S. Trivikrama Rao

Authors
  1. V. Brahmananda Rao
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  2. S. Trivikrama Rao
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Brahmananda Rao, V., Trivikrama Rao, S. A theoretical and synoptic study of western disturbances. PAGEOPH 90, 193–208 (1971). https://doi.org/10.1007/BF00875523

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  • DOI: https://doi.org/10.1007/BF00875523

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